Quantum Discord Behavior for Two Qubits Heisenberg XYZ Chain with Inhomogeneous Magnetic Field

We report the quantum correlation behavior (quantum discord (QD)) of a two-qubit anisotropic Heisenberg XYZ chain under an inhomogeneous magnetic field. It is shown that in the lower region of b QD can be enhanced evidently through increasing anisotropic parameter gamma, while the effects of gamma are disappear when b is strong enough. The role of J (z) is nearly opposite to gamma, there is a critical value of b (c) , with b > b (c) QD is improved with decreasing interaction J (z) , while the value of QD is nearly invariable whatever changing J (z) when b < b (c) . In addition, one can get non-zero QD by properly tuning J (z) and gamma even at a higher temperature. When inhomogeneity is increased to b (c) , the QD can exhibit a regrowth procession, and the regrowth value of QD can be larger than that of before dropping in the region of weak J (z) . We also obtain the ground state QD properties. These investigations can imply us more control parameters on quantum correlation in solid state systems.